In an ideal world, machines can be built by wiring devices together
with configuration, not code. Unfortunately, that's not the world we
live in right now. We still have quite a few devices that need to be
wired up by code. If you try to device_add such a device, it'll fail
in sometimes mysterious ways. If you're lucky, you get an
unmysterious immediate crash.
To protect users from such badness, DeviceClass member no_user used to
make device models unavailable with -device / device_add, but that
regressed in commit 18b6dad
. The device model is still omitted from
help, but is available anyway.
Attempts to fix the regression have been rejected with the argument
that the purpose of no_user isn't clear, and it's prone to misuse.
This commit clarifies no_user's purpose. Anthony suggested to rename
it cannot_instantiate_with_device_add_yet_due_to_internal_bugs, which
I shorten somewhat to keep checkpatch happy. While there, make it
bool.
Every use of cannot_instantiate_with_device_add_yet gets a FIXME
comment asking for rationale. The next few commits will clean them
all up, either by providing a rationale, or by getting rid of the use.
With that done, the regression fix is hopefully acceptable.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Marcel Apfelbaum <marcel.a@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
133 lines
3.9 KiB
C
133 lines
3.9 KiB
C
/*
|
|
* QEMU PIIX4 PCI Bridge Emulation
|
|
*
|
|
* Copyright (c) 2006 Fabrice Bellard
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*/
|
|
|
|
#include "hw/hw.h"
|
|
#include "hw/i386/pc.h"
|
|
#include "hw/pci/pci.h"
|
|
#include "hw/isa/isa.h"
|
|
#include "hw/sysbus.h"
|
|
|
|
PCIDevice *piix4_dev;
|
|
|
|
typedef struct PIIX4State {
|
|
PCIDevice dev;
|
|
} PIIX4State;
|
|
|
|
static void piix4_reset(void *opaque)
|
|
{
|
|
PIIX4State *d = opaque;
|
|
uint8_t *pci_conf = d->dev.config;
|
|
|
|
pci_conf[0x04] = 0x07; // master, memory and I/O
|
|
pci_conf[0x05] = 0x00;
|
|
pci_conf[0x06] = 0x00;
|
|
pci_conf[0x07] = 0x02; // PCI_status_devsel_medium
|
|
pci_conf[0x4c] = 0x4d;
|
|
pci_conf[0x4e] = 0x03;
|
|
pci_conf[0x4f] = 0x00;
|
|
pci_conf[0x60] = 0x0a; // PCI A -> IRQ 10
|
|
pci_conf[0x61] = 0x0a; // PCI B -> IRQ 10
|
|
pci_conf[0x62] = 0x0b; // PCI C -> IRQ 11
|
|
pci_conf[0x63] = 0x0b; // PCI D -> IRQ 11
|
|
pci_conf[0x69] = 0x02;
|
|
pci_conf[0x70] = 0x80;
|
|
pci_conf[0x76] = 0x0c;
|
|
pci_conf[0x77] = 0x0c;
|
|
pci_conf[0x78] = 0x02;
|
|
pci_conf[0x79] = 0x00;
|
|
pci_conf[0x80] = 0x00;
|
|
pci_conf[0x82] = 0x00;
|
|
pci_conf[0xa0] = 0x08;
|
|
pci_conf[0xa2] = 0x00;
|
|
pci_conf[0xa3] = 0x00;
|
|
pci_conf[0xa4] = 0x00;
|
|
pci_conf[0xa5] = 0x00;
|
|
pci_conf[0xa6] = 0x00;
|
|
pci_conf[0xa7] = 0x00;
|
|
pci_conf[0xa8] = 0x0f;
|
|
pci_conf[0xaa] = 0x00;
|
|
pci_conf[0xab] = 0x00;
|
|
pci_conf[0xac] = 0x00;
|
|
pci_conf[0xae] = 0x00;
|
|
}
|
|
|
|
static const VMStateDescription vmstate_piix4 = {
|
|
.name = "PIIX4",
|
|
.version_id = 2,
|
|
.minimum_version_id = 2,
|
|
.minimum_version_id_old = 2,
|
|
.fields = (VMStateField[]) {
|
|
VMSTATE_PCI_DEVICE(dev, PIIX4State),
|
|
VMSTATE_END_OF_LIST()
|
|
}
|
|
};
|
|
|
|
static int piix4_initfn(PCIDevice *dev)
|
|
{
|
|
PIIX4State *d = DO_UPCAST(PIIX4State, dev, dev);
|
|
|
|
isa_bus_new(&d->dev.qdev, pci_address_space_io(dev));
|
|
piix4_dev = &d->dev;
|
|
qemu_register_reset(piix4_reset, d);
|
|
return 0;
|
|
}
|
|
|
|
int piix4_init(PCIBus *bus, ISABus **isa_bus, int devfn)
|
|
{
|
|
PCIDevice *d;
|
|
|
|
d = pci_create_simple_multifunction(bus, devfn, true, "PIIX4");
|
|
*isa_bus = ISA_BUS(qdev_get_child_bus(DEVICE(d), "isa.0"));
|
|
return d->devfn;
|
|
}
|
|
|
|
static void piix4_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
|
|
|
|
k->no_hotplug = 1;
|
|
k->init = piix4_initfn;
|
|
k->vendor_id = PCI_VENDOR_ID_INTEL;
|
|
k->device_id = PCI_DEVICE_ID_INTEL_82371AB_0;
|
|
k->class_id = PCI_CLASS_BRIDGE_ISA;
|
|
dc->desc = "ISA bridge";
|
|
dc->cannot_instantiate_with_device_add_yet = true; /* FIXME explain why */
|
|
dc->vmsd = &vmstate_piix4;
|
|
}
|
|
|
|
static const TypeInfo piix4_info = {
|
|
.name = "PIIX4",
|
|
.parent = TYPE_PCI_DEVICE,
|
|
.instance_size = sizeof(PIIX4State),
|
|
.class_init = piix4_class_init,
|
|
};
|
|
|
|
static void piix4_register_types(void)
|
|
{
|
|
type_register_static(&piix4_info);
|
|
}
|
|
|
|
type_init(piix4_register_types)
|